Figure 7From: Biomimetic Synthesis of Gelatin Polypeptide-Assisted Noble-Metal Nanoparticles and Their Interaction StudyUV–vis spectra of AuNPs colloid against pH (a) and NaCl (b). The pH in a are (1) 0.2, (2) 2.0, (3) 4.7 (pI), (4) 9.0, (5) 13.0. The pH of gelatin-AuNPs colloid was adjusted by 0.01 M NaOH and HCl solution; The concentrations of NaCl in b are (1) 0.9%, (2) 2%, (3) 4%, (4) 8%, (5) 10%, (6) 12%, (7) 36.5%.Back to article page